/Engine/Plugins/Online/OnlineFramework/Source/Party/Public/Chat/ChatSlashCommands.h
void TryCacheValidAutoCompleteUser ( [USocialUser](API\Plugins\Party\User\USocialUser) & User, const [TArray](API\Runtime\Core\Containers\TArray)< [FString](API\Runtime\Core\Containers\FString) > & StringTokens )